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SN74AUP1G17: maximal temperature

Martin Bohnjat
Prodigy 60 points
Part Number: SN74AUP1G17

Dear TI,

I have a question about maximal temperature of Schmitt trigger SN74AUP1G17.

Its maximal junction temperature is 150 °C and maximal operating free-air temperature is 85 °C.

Electrical characteristics (like thresholds, switching characteristics, etc.) are defined over recommended operating free-air temperature range (-40 °C to 85 °C).

What if my ambient temperature is slightly above maximal operating free-air temperature, e.g. 95 °C? Can I somehow estimate how much the electrical characteristics can change? It is still fair below maximal junction temperature so the device will not be damaged but I question the parameters.

Expected power loss at the Schmitt trigger in my application is minimal (switching frequency is almost 0). The component is heated by other components on PCB.

Thank you.

  • 0
    Guru 316940 points

    Temperatures above 85 °C have not been tested. This information probably does not exist, and you have to measure yourself.

  • 0
    TI__Genius 12891 points

    Hi Martin,

    As Clemens said we test data points that we intend to put into the datasheet, so we don't have this data on hand. We suggest you stay within our recommended ranges if possible. If not I can tell you that generally the hysteresis will decrease, but you likely won't see values too different from the ones listed across the temp range if you're operating really close to it.

    Regards,

    Owen